An indoor garden is a place where winter does not exist, and that’s quite something when you live in a cold climate. Indeed, it is a happy place.
In today’s video (see below), we talk about the lemon tree that we grow indoors during the winter and in the Geodesic dome during the summer. It is a Meyer Lemon and the tree is now almost 3 years with us. The tree grows during the winter months in the indoor garden room. During the summer we keep it in the Geodesic Dome greenhouse. It could also stay indoors year-round, and maybe as the tree grows and we get tired of moving it, we will keep it here.
The tree does need at least 50% light, ours is at the east window, getting some sunlight from the south also.
We are often asked, how to grow lemons in a cold climate. Here are some things that can be helpful.
Pruning the lemon tree
I watched some videos on pruning a lemon tree and found out that it is not much different than an apple tree. All the branches that grow inside the tree or straight up have to go. If something grows too low, it is pruned away as well. Our tree has a bush shape, and so far we like it. Maybe down the road, we will prune it into a tree, but so far we have not seen any need for it.
Transplanting a lemon tree
The trees are usually sold in too small pots, to keep them small. We transplanted the tree right away. For lemon trees, I hear that deeper pots are better. You can also use a grow bag to encourage healthy root growth. Grow bags can be easily made or bought.
How to know when to transplant?
A healthy tree is lash green and is productive. When you see that the leaves are not as vibrant as they used to be, it can be two things, either the tree needs a new pot or fertilizer. It can of course be both.
Also judging by the size of the tree, if the tree is big and the pot small, it most likely would benefit from a bigger pot. You can also take the tree out of the pot and see if the tree is root-bound (lots of roots visible at the age of the pot), if it is, it needs a new pot. However, if you can, do not wait till the roots are very bound. In case the roots go round, gently loosen them (you can also trim them some) before transplanting, so they can grow healthy again.
Use loose soil that retains moisture well. If using potting soil you might want to add some more vermiculate. Or make your own soil from the All new Square Foot Garden book. Mix together Mel’s Mix: 1/3 compost, 1/3 vermiculite, 1/3 peat moss.
Lemon trees never really go dormant, but do grow less during the winter. Personly we transplant in autumn, before bringing the tree into the indoor garden. The tree does not need transplanting every year, only every 2 -4 years. However, every fall we do remove and renew the top layer of soil, or mulch if used to make sure not to transfer any unwanted insects into the indoor garden.
Mulching is a great way to keep the tree from drying out. Rice Hull’s mulch is best, coconut or bark work too.
Watering and Fertilizing the Lemon tree
The lemon tree likes to dry out between watering, especially during the winter when growth is slow.
The fertilizing for a lemon tree should be high in nitrogen. The easiest is to get a ready-made fertilizer for potted trees. Follow the instructions of the fertilizer you get that’s what we do too, no experts here.
Pollinating an indoor lemon tree
The flowers are the next best thing on a lemon tree, next to the fruit of course. The blossoms are so beautiful and fragrant.
When you look at the flowers they do not all look the same, there are male and female flowers, that’s why lemons are self-fertile. You can get all scientific about the different parts, however, we like to keep things simple. We have had good results by just shacking the flower cluster so the pollen moves around, very much like it would in a windy situation. Or take a brush and gently move from flower to flower to distribute the pollen as a bee would.
Indoor garden update on video
If you are growing a lemon tree, please share your insights with us. We love to learn together.